Membership in Unitas Malacologica costs only EUR 16 per year (or about 20 US dollars).
Membership dues are paid in three-yearly installments (EUR 48.00), and can be paid by international money order or by credit card.

Constitution and bylawsThe Constitution and bylaws of Unitas Malacologica were adopted in 2001 at the WCM in Vienna, and originally published in UM Newsletter 16 [pdf]. You can download the complete constitution and bylaws here as a Word document.UM Constitution and Bylaws [doc]